我只是按照yii网站上的指示操作，对composer不是很了解。我按照这里的指示进行操作http://www.yiiframework.com/doc-2.0/guide-start-installation.html
认证似乎正在工作，但是它一遍又一遍地提示我输入用户名/密码。
有人能给我一些检查的建议，看看为什么会一直提示我输入呢？
[root@dndbox html]# composer create-project --prefer-dist --stability=dev yiisoft/yii2-app-basic basic
Installing yiisoft/yii2-app-basic (dev-master b528289495bf9721d2b8c628d69caad42e45b0ce)
- Installing yiisoft/yii2-app-basic (dev-master master)
Downloading: connection...
Could not fetch https://api.github.com/repos/yiisoft/yii2-app-basic/zipball/b528289495bf9721d2b8c628d69caad42e45b0ce, enter your GitHub credentials to go over the API rate limit
The credentials will be swapped for an OAuth token stored in /root/auth.json, your password will not be stored
To revoke access to this token you can visit https://github.com/settings/applications
Username: *.com
Password:
An existing OAuth token for Composer is present and will be reused
Could not fetch https://api.github.com/authorizations, enter your GitHub credentials to go over the API rate limit
The credentials will be swapped for an OAuth token stored in /root/auth.json, your password will not be stored
To revoke access to this token you can visit https://github.com/settings/applications
Username: *.com
Password:
An existing OAuth token for Composer is present and will be reused
Could not fetch https://api.github.com/authorizations, enter your GitHub credentials to go over the API rate limit
The credentials will be swapped for an OAuth token stored in /root/auth.json, your password will not be stored
To revoke access to this token you can visit https://github.com/settings/applications
Username:
如果我访问提供的URL，会收到JSON中的错误消息：https://api.github.com/authorizations。
{
"message": "API rate limit exceeded for xxx.xxx.xxx.26. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)",
"documentation_url": "https://developer.github.com/v3/#rate-limiting"
}